Bandwidth Improvement of a Leaky Wave Antenna using Dual Layer Fully Metallic Partially Reflected Surface

This paper presents an improvement in the bandwidth of a Leaky Wave Antenna. In high power applications, the use of dielectrics is often discouraged and hence, metallic construction is preferred. The gain-bandwidth can be improved to 8.5% against 5.7%, which is typical for one with a single-layer metallic Partially Reflecting Screen. A positive slope of the reflection phase varying with frequency is achieved using two reflecting surfaces. Both Leaky Wave Cavities are unshielded without sidewalls, which prospectively allows interlacing feeds for a close feed periodicity.